[pulseaudio-discuss] Crackling sound with module-loopback

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Wed Apr 4 15:33:48 PDT 2012

> I do this with (on machine A):
> pacmd load-module module-tunnel-sink server= rate=48000 channels=2
> pacmd load-module module-loopback source=alsa_input.pci-0000_00_05.0.analog-stereo sink=tunnel. latency_msec=80 rate=48000 channels=2
> Using this, I get sound (usually - but that's a different problem). However
> the sound is very crackly. It ranges from "slight crackle that's annoying" to
> "I can't even tell what song is playing".
Couple of suggestions:
- increase the latency. 80ms seems low for a network connection
- change the resampling. the default is a trivial resampler, this could 
cause quality problems as well.

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